A177407 - cp's OEIS frontend

A177407 Form triangle of weighted Farey fractions; read denominators by rows.

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	1
7	5
8	7
9	3
10	9
11	9
12	3
13	7
14	5
15	1
16	1
17	7
18	11
19	5
20	17
21	19
22	7
23	17
24	13
25	3
26	5
27	7
28	9
29	27
30	27
31	9
32	7
33	5
34	3
35	13
36	17
37	7
38	19
39	17
40	5
41	11
42	7
43	1
44	1
45	9
46	15
47	7
48	25
49	29
50	11
51	27
52	21
53	5
54	9
55	13
56	17
57	53
58	55
59	19
60	15
61	11
62	7
63	31
64	41
65	17
66	47
67	43
68	13
69	29
70	19
71	3
72	11
73	13
74	5
75	17
76	19
77	7
78	23
79	25
80	9

[1, 1, 1, 3, 3, 1, 1, 5, 7, 3, 9, 9, 3, 7, 5, 1, 1, 7, 11, 5, 17, 19, 7, 17, 13, 3, 5, 7, 9, 27, 27, 9, 7, 5, 3, 13, 17, 7, 19, 17, 5, 11, 7, 1, 1, 9, 15, 7, 25, 29, 11, 27, 21, 5, 9, 13, 17, 53, 55, 19, 15, 11, 7, 31, 41, 17, 47, 43, 13, 29, 19, 3, 11, 13, 5, 17, 19, 7, 23, 25, 9]

cp's OEIS Frontend

A177407 Form triangle of weighted Farey fractions; read denominators by rows.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	1
7	5
8	7
9	3
10	9
11	9
12	3
13	7
14	5
15	1
16	1
17	7
18	11
19	5
20	17
21	19
22	7
23	17
24	13
25	3
26	5
27	7
28	9
29	27
30	27
31	9
32	7
33	5
34	3
35	13
36	17
37	7
38	19
39	17
40	5
41	11
42	7
43	1
44	1
45	9
46	15
47	7
48	25
49	29
50	11
51	27
52	21
53	5
54	9
55	13
56	17
57	53
58	55
59	19
60	15
61	11
62	7
63	31
64	41
65	17
66	47
67	43
68	13
69	29
70	19
71	3
72	11
73	13
74	5
75	17
76	19
77	7
78	23
79	25
80	9

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	1
7	5
8	7
9	3
10	9
11	9
12	3
13	7
14	5
15	1
16	1
17	7
18	11
19	5
20	17
21	19
22	7
23	17
24	13
25	3
26	5
27	7
28	9
29	27
30	27
31	9
32	7
33	5
34	3
35	13
36	17
37	7
38	19
39	17
40	5
41	11
42	7
43	1
44	1
45	9
46	15
47	7
48	25
49	29
50	11
51	27
52	21
53	5
54	9
55	13
56	17
57	53
58	55
59	19
60	15
61	11
62	7
63	31
64	41
65	17
66	47
67	43
68	13
69	29
70	19
71	3
72	11
73	13
74	5
75	17
76	19
77	7
78	23
79	25
80	9

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	1
6	1
7	5
8	7
9	3
10	9
11	9
12	3
13	7
14	5
15	1
16	1
17	7
18	11
19	5
20	17
21	19
22	7
23	17
24	13
25	3
26	5
27	7
28	9
29	27
30	27
31	9
32	7
33	5
34	3
35	13
36	17
37	7
38	19
39	17
40	5
41	11
42	7
43	1
44	1
45	9
46	15
47	7
48	25
49	29
50	11
51	27
52	21
53	5
54	9
55	13
56	17
57	53
58	55
59	19
60	15
61	11
62	7
63	31
64	41
65	17
66	47
67	43
68	13
69	29
70	19
71	3
72	11
73	13
74	5
75	17
76	19
77	7
78	23
79	25
80	9